1982 - wrote first data map program plotting navy ship positions on APPLE2 in Japan.

1983 - wrote VIC-20 VHF/HF BBS and Gateway and defined 200 Hz shift due to development of mods to dozens of surplus VADCG bell 103 modems with cross-county links to W0RPK, W9TD, and K7PYK on 10.149 MHz. Remained on the air 5 years through 1989 under the FCC STA for automatic packet HF operations. Developed larger system on the Commodore C-64 for BBS's used around the world through the 90's.

1984 - Developed CETS (Connectionless Emergency Traffic System) on Vic-20 and C-64 for digital packet comms in support of 100 mile cross country endurence run for AMRAD.

1986 - or so, used CETS for amateur packet radio support of the FEMA National Disaster Medical System exercises in DC area.

1988 - or so, ported CETS over to the new IBM AT PC and began to add maps and position plotting of stations.

1990 - or so. Began hand making maps of the USA for CETWS use.

1992 - Changed name of CETS to APRS and presented paper at DCC in Teaneck NJ where I first met Sproul Brothers who later wrote Mac and WinAPRS.